write the names and symbols of the constituent elements and identify their valencies from the molecular formulae given below (1) H2SO4 (2)NaOH (3)CCl4 (4)HNO3 (5)SO2 (6)HF (7) CaCO3 (8)KOH
Answers
Answer:
1. H₂SO₄
H = Hydrogen with a valency of +1.
S = Sulphur with a valency of -2.
O = Oxygen with a valency of -2.
2. NaOH
Na = Sodium with a valency of +1.
OH = Hydroxide with a valency of -1.
O = Oxygen with a valency of -2.
H = Hydrogen with a valency of +1.
3. CCl₄
C = Carbon with a valency of -4.
Cl = Chlorine with a valency of -1.
4. HNO₃
H = Hydrogen with a valency of +1.
N = Nitrogen with a valency of -3.
O = Oxygen with a valency of -2.
5. SO₂
S = Sulphur with a valency of -2.
O = Oxygen with a valency of -2.
6. HF
H = Hydrogen with a valency of +1.
F = Fluorine with a valency of -1.
7. CaCO₃
Ca = Calcium with a valency of +2.
C = Carbon with a valency of -4.
O = Oxygen with a valency of -2.
8. KOH
K = Potassium with a valency of +1.
O = Oxygen with a valency of -2.
H = Hydrogen with a valency of +1.
Hope this helps.